Summarize
Sketch maps prepared by an unidentified member of D.91 depict the defense network of RVNAF An HoĆ Post in the vicinity of Duc Duc District seat and Thach Ban Dam, Quang Nam Province. Artillery emplacements, a hospital, a tank parking area, and watchtowers, surrounded by barbed wire fences, are shown. Also depicted are red arrows and notes indicating attacks by C2 and C5 of D.91 on 12 May and 7 Jun 69.